From b974fac576b620436af64ad8b617f2276b756a05 Mon Sep 17 00:00:00 2001
From: Robin Burchell <robin.burchell@viroteck.net>
Date: Sat, 10 Jan 2015 22:12:29 +0100
Subject: Implement DefUses::Temps with a QVarLengthArray.

Avoiding heap allocations here shaves 100ms or so off the optimizer runtime.

Change-Id: If00c757532ffe90f2fa9c62dc999bb69e25bb71c
Task-number: QTBUG-43719
Reviewed-by: Erik Verbruggen <erik.verbruggen@theqtcompany.com>
---
 src/qml/compiler/qv4ssa.cpp | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

(limited to 'src/qml/compiler')

diff --git a/src/qml/compiler/qv4ssa.cpp b/src/qml/compiler/qv4ssa.cpp
index c0a14a5c80..f47839f061 100644
--- a/src/qml/compiler/qv4ssa.cpp
+++ b/src/qml/compiler/qv4ssa.cpp
@@ -1073,10 +1073,7 @@ public:
 
 private:
     std::vector<DefUse> _defUses;
-    class Temps: public QVector<Temp> {
-    public:
-        Temps() { reserve(4); }
-    };
+    typedef QVarLengthArray<Temp, 4> Temps;
     std::vector<Temps> _usesPerStatement;
 
     void ensure(Temp *newTemp)
@@ -1219,7 +1216,7 @@ public:
         ensure(s);
     }
 
-    const QVector<Temp> &usedVars(Stmt *s) const
+    const Temps &usedVars(Stmt *s) const
     {
         Q_ASSERT(s->id() >= 0);
         Q_ASSERT(static_cast<unsigned>(s->id()) < _usesPerStatement.size());
-- 
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